System1, Inc. SEC filings SST
System1, Inc. has 615 filings in SEC EDGAR's recent list, going back to Mar 23, 2020. Its latest annual report, Form 10-K, was filed on Mar 11, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 5, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 30, 2026 (officer or director change). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 2, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Dec 2, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Nov 12, 2025 | — |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Aug 26, 2025 | Aug 22, 2025 |
| 4 | Insider transaction | Aug 21, 2025 | Aug 19, 2025 |
| 4 | Insider transaction | Aug 5, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 5, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Jul 31, 2025 | Jul 29, 2025 |
| 4 | Insider transaction | Jul 30, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 30, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 30, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 30, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| 4 | Insider transaction | Jun 17, 2025 | Jun 13, 2025 |
| 4 | Insider transaction | Jun 13, 2025 | Jun 12, 2025 |
| 4 | Insider transaction | Jun 11, 2025 | Jun 9, 2025 |
| SCHEDULE 13D | Ownership over 5% (active) | May 5, 2025 | — |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 2025 |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 2025 |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 2025 |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 2025 |
| 4 | Insider transaction | Apr 17, 2025 | Apr 15, 2025 |
| 4 | Insider transaction | Apr 17, 2025 | Apr 15, 2025 |
| 4 | Insider transaction | Apr 17, 2025 | Apr 15, 2025 |
| 4 | Insider transaction | Apr 17, 2025 | Apr 15, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Mar 25, 2025 | — |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Dec 27, 2024 | Dec 24, 2024 |
| 4 | Insider transaction | Oct 31, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 31, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 31, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 31, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 16, 2024 | Oct 15, 2024 |
| 4 | Insider transaction | Oct 16, 2024 | Oct 15, 2024 |
| 4 | Insider transaction | Oct 16, 2024 | Oct 15, 2024 |
| 4 | Insider transaction | Sep 19, 2024 | Sep 16, 2024 |
| 4 | Insider transaction | Sep 12, 2024 | Sep 10, 2024 |
| 4 | Insider transaction | Sep 9, 2024 | Sep 5, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Aug 30, 2024 |
| 4 | Insider transaction | Aug 23, 2024 | Aug 21, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 16, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 15, 2024 | Aug 13, 2024 |
| 4 | Insider transaction | Aug 14, 2024 | Aug 12, 2024 |
| 4 | Insider transaction | Aug 14, 2024 | Aug 12, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 22, 2024 | Jul 18, 2024 |
| 4 | Insider transaction | Jul 22, 2024 | Jul 18, 2024 |
| 4 | Insider transaction | Jul 22, 2024 | Jul 18, 2024 |
| 4 | Insider transaction | Jul 22, 2024 | Jul 18, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 4 | Insider transaction | Jul 11, 2024 | Jul 9, 2024 |
| 4 | Insider transaction | Jul 8, 2024 | Jul 3, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jun 28, 2024 |
| 4 | Insider transaction | Jun 27, 2024 | Jun 25, 2024 |
| 4/A | Form 4/a | Jun 26, 2024 | Jun 17, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 26, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jun 25, 2024 | — |
| 4 | Insider transaction | Jun 24, 2024 | Jun 20, 2024 |
| 4 | Insider transaction | Jun 21, 2024 | Jun 17, 2024 |
| 4 | Insider transaction | Jun 21, 2024 | Jun 17, 2024 |
| 3 | Initial insider ownership | Jun 21, 2024 | Jun 17, 2024 |
| SC 13D | Ownership over 5% (active) | Jun 21, 2024 | — |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | May 16, 2024 | May 15, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | Apr 30, 2024 | Apr 29, 2024 |
| 4 | Insider transaction | Apr 19, 2024 | Apr 17, 2024 |
| 3 | Initial insider ownership | Apr 19, 2024 | Apr 10, 2024 |
| 3 | Initial insider ownership | Apr 19, 2024 | Apr 10, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| 4 | Insider transaction | Apr 17, 2024 | Apr 15, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Mar 21, 2024 | — |
| 4 | Insider transaction | Mar 19, 2024 | Mar 15, 2024 |
| 4/A | Form 4/a | Mar 19, 2024 | Dec 15, 2023 |
| SC 13G | Ownership over 5% (passive) | Feb 22, 2024 | — |
| 4 | Insider transaction | Feb 16, 2024 | Feb 15, 2024 |
| 4 | Insider transaction | Jan 30, 2024 | Jan 26, 2024 |
| 4 | Insider transaction | Jan 30, 2024 | Jan 26, 2024 |
| 4 | Insider transaction | Jan 30, 2024 | Jan 26, 2024 |
| 4 | Insider transaction | Jan 30, 2024 | Jan 26, 2024 |
| 4 | Insider transaction | Jan 30, 2024 | Jan 26, 2024 |
| 4 | Insider transaction | Jan 17, 2024 | Jan 15, 2024 |
| 4 | Insider transaction | Jan 17, 2024 | Jan 15, 2024 |
| 4 | Insider transaction | Jan 17, 2024 | Jan 15, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Jan 5, 2024 | — |
| SC 13D | Ownership over 5% (active) | Jan 5, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jan 5, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jan 5, 2024 | — |
| 4 | Insider transaction | Dec 18, 2023 | Dec 15, 2023 |
| 4 | Insider transaction | Dec 18, 2023 | Nov 22, 2023 |
| 4 | Insider transaction | Dec 18, 2023 | Nov 22, 2023 |
| SC 13G | Ownership over 5% (passive) | Dec 7, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 6, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Dec 6, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 17, 2023 | — |
| 4 | Insider transaction | Nov 15, 2023 | Nov 15, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 17, 2023 | Oct 16, 2023 |
| 4 | Insider transaction | Oct 17, 2023 | Oct 16, 2023 |
| 4 | Insider transaction | Oct 17, 2023 | Oct 16, 2023 |
| 4 | Insider transaction | Sep 7, 2023 | Sep 6, 2023 |
| 144 | Notice of proposed sale | Sep 6, 2023 | — |
| SC 13D | Ownership over 5% (active) | Sep 6, 2023 | — |
| 4 | Insider transaction | Aug 17, 2023 | Aug 15, 2023 |
| 4 | Insider transaction | Aug 17, 2023 | Aug 15, 2023 |
| 3 | Initial insider ownership | Aug 17, 2023 | Aug 15, 2023 |
| 3 | Initial insider ownership | Aug 17, 2023 | Aug 15, 2023 |
| 4 | Insider transaction | Aug 16, 2023 | Aug 15, 2023 |
| 4 | Insider transaction | Aug 3, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 3, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 2, 2023 | Jul 31, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jul 28, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jul 28, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jul 28, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jul 28, 2023 |
| 4 | Insider transaction | Aug 1, 2023 | Jul 28, 2023 |
| 4 | Insider transaction | Jul 18, 2023 | Jul 15, 2023 |
| 4 | Insider transaction | Jul 18, 2023 | Jul 15, 2023 |
| 4 | Insider transaction | Jul 18, 2023 | Jul 15, 2023 |
| 3 | Initial insider ownership | Jun 30, 2023 | Jun 20, 2022 |
| 3 | Initial insider ownership | Jun 30, 2023 | Jun 20, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 21, 2023 | — |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Services-Computer Programming, Data Processing, Etc. (SIC 7370)
- Listed as
- SST (NYSE), SSTPW (OTC)
- Fiscal year ends
- December 31
- Headquarters
- Marina Del Rey, CA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1805833
- Former names
- Trebia Acquisition Corp. (until Jan 26, 2022)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.